/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.nacos.config.server.auth;

import com.alibaba.nacos.config.server.configuration.ConditionOnEmbeddedStorage;
import com.alibaba.nacos.config.server.model.Page;
import com.alibaba.nacos.config.server.model.User;
import com.alibaba.nacos.config.server.service.repository.EmbeddedStoragePersistServiceImpl;
import com.alibaba.nacos.config.server.service.repository.PaginationHelper;
import com.alibaba.nacos.config.server.service.repository.DatabaseOperate;
import com.alibaba.nacos.config.server.service.sql.EmbeddedStorageContextUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Conditional;
import org.springframework.stereotype.Component;

import java.util.ArrayList;

import static com.alibaba.nacos.config.server.service.repository.RowMapperManager.USER_ROW_MAPPER;

/**
 * There is no self-augmented primary key
 *
 * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
 */
@Conditional(value = ConditionOnEmbeddedStorage.class)
@Component
public class EmbeddedUserPersistServiceImpl implements UserPersistService {

	@Autowired
	private DatabaseOperate databaseOperate;

	@Autowired
	private EmbeddedStoragePersistServiceImpl persistService;

	public void createUser(String username, String password) {
		String sql = "INSERT into users (username, password, enabled) VALUES (?, ?, ?)";

		try {
			EmbeddedStorageContextUtils.addSqlContext(sql, username, password, true);
			databaseOperate.blockUpdate();
		} finally {
			EmbeddedStorageContextUtils.cleanAllContext();
		}
	}

	public void deleteUser(String username) {
		String sql = "DELETE from users WHERE username=?";
		try {
			EmbeddedStorageContextUtils.addSqlContext(sql, username);
			databaseOperate.blockUpdate();
		} finally {
			EmbeddedStorageContextUtils.cleanAllContext();
		}
	}

	public void updateUserPassword(String username, String password) {
		try {
			EmbeddedStorageContextUtils.addSqlContext(
					"UPDATE users SET password = ? WHERE username=?",
					password, username);
			databaseOperate.blockUpdate();
		} finally {
			EmbeddedStorageContextUtils.cleanAllContext();
		}
	}

	public User findUserByUsername(String username) {
		String sql = "SELECT username,password FROM users WHERE username=? ";
		return databaseOperate.queryOne(sql, new Object[]{username}, USER_ROW_MAPPER);
	}

	public Page<User> getUsers(int pageNo, int pageSize) {

		PaginationHelper<User> helper = persistService.createPaginationHelper();

		String sqlCountRows = "select count(*) from users where ";
		String sqlFetchRows
				= "select username,password from users where ";

		String where = " 1=1 ";
		Page<User> pageInfo = helper.fetchPage(sqlCountRows
						+ where, sqlFetchRows + where, new ArrayList<String>().toArray(), pageNo,
				pageSize, USER_ROW_MAPPER);
		if (pageInfo == null) {
			pageInfo = new Page<>();
			pageInfo.setTotalCount(0);
			pageInfo.setPageItems(new ArrayList<>());
		}
		return pageInfo;
	}


}
